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Ashwagandha Extract

21st Century
4.7
★ ★ ★ ★ ★
(873 ratings)
Ashwagandha 500 mg
Product Image
Score85
A substantial, low-cost ashwagandha extract with useful marker disclosure but confusing repeated label amounts.
How scoring works
Quantity:60 Capsule(s) • (60 servings)
Goals:
Sleep Support
Stress Relief
Productivity Boost
Mood Support
Testosterone Support
Fitness
Cognitive Support

Score 85

A substantial, low-cost ashwagandha extract with useful marker disclosure but confusing repeated label amounts.
How scoring works
$12.99($0.21 per serving)
iHerb
$ 12.99
iHerb
$ 12.99
Amazon
$ 12.99
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Analysis

The label presents 500 mg ashwagandha extract and identifies root, leaf, and withanolide glycosides. That suggests a characterized extract rather than plain herb powder.

Each descriptor repeats the 500 mg amount, so the supplied data should not be interpreted as 1,500 mg without clarification. A withanolide percentage is not stated, limiting direct potency comparison.

The capsule offers strong value for a substantial extract amount. Stress and sleep are the most practical targets; broader muscle, testosterone, and cognitive claims should remain secondary.

Who is it for
  • Adults seeking a higher-amount ashwagandha extract
  • Value-focused users
Best for
  • Stress support
  • Sleep routines
  • General adaptogen use

Pros

  • Lists a 500 mg extract
  • Identifies withanolide glycosides
  • Strong routine value

Cons

  • Repeated amount lines are ambiguous
  • Withanolide percentage is missing
  • Broad goal list exceeds clear evidence

Warnings

  • Ashwagandha may cause drowsiness or stomach upset and can add to sedative effects.
  • Avoid during pregnancy, and use extra care with thyroid conditions or thyroid medicine.
  • Stop use and seek care for jaundice, dark urine, or severe abdominal symptoms because rare liver injury has been reported.

Nutrient quality

89 Highest impact

A concentrated ashwagandha extract with identified withanolide markers supports a focused formula. The daily amount is meaningful, but the marker percentage is not disclosed.

Ingredient transparency

82 Highest impact

Active ingredients and their amounts are individually disclosed without a hidden blend. Complete intake directions and a full non-active ingredient list are not supplied.

Customer satisfaction

72 High impact

The aggregate rating is strong and is supported by a moderate review sample. No review comments are supplied, so recurring complaints and purpose fit cannot be checked directly.

Value for money

96 Highest impact

The effective serving offers strong value relative to the formula quality. A focused ingredient list supports efficient spending.

Report analysis

Goals

Sleep Support
Sleep Support
Impact
Highest effect
A+ Goal FitA Strength of SupportA CoverageA+ Formula Quality

Ashwagandha Extract from 21st Century covers circadian regulation, nervous-system relaxation, mineral or physical relaxation support, producing strong alignment with sleep support.

Collection-specific evidence indicates strong dose adequacy and strong form or disclosure quality, with the main limitation being variable evidence across the included calming actives.

Study evidence
Ashwagandha Supportive 18 studies
Stress Relief
Stress Relief
Impact
Highest effect
A- Goal FitA- Strength of SupportC+ CoverageA+ Formula Quality
Ashwagandha · 500 mg

21st Century Ashwagandha Extract has a supplied customer average of 4.68 from 860 reviews, and no finished-product certification is established in the supplied research.

500 mg of leaf-and-root extract is the central stress-support feature, while ashwagandha can cause drowsiness or stomach upset and warrants caution during pregnancy and with relevant thyroid, autoimmune, liver, or medication concerns.

Study evidence
Ashwagandha Supportive 47 studies
Productivity Boost
Productivity Boost
Impact
Highest effect
B Goal FitA Strength of SupportC+ CoverageB+ Formula Quality

Ashwagandha Extract aligns with Productivity Boost mainly through Ashwagandha, while the supplied collection analyses average 85.6 and supplied customer feedback is 4.68 from 860 reviews.

Its strongest feature is dose adequacy, while coverage remains intentionally narrow; it appears better suited to a targeted role within a broader routine.

Study evidence
Ashwagandha Supportive 6 studies
Mood Support
Mood Support
Impact
Highest effect
B- Goal FitA Strength of SupportC- CoverageA Formula Quality
Ashwagandha · 500 mg

Ashwagandha Extract appears best understood as a well-dosed standardized stress-response active, and the configured scores reflect that degree of Mood Support alignment.

Supplied customer feedback averages 4.68 from 860 reviews; nCCIH notes thyroid interactions and rare liver injury with ashwagandha, so individual risk review remains important.

Study evidence
Ashwagandha Supportive 29 studies
Testosterone Support
Testosterone Support
Impact
High effect
B Goal FitA- Strength of SupportD+ CoverageA Formula Quality
Ashwagandha · 500 mg

Ashwagandha Extract is well aligned with Testosterone Support because its highlighted actives include withanolide-standardized ashwagandha at 500 mg; evidence for the formula as a whole is moderate.

Customer feedback averages 4.68 out of 5 across 860 reviews; ashwagandha warrants caution during pregnancy and with thyroid, liver, or interacting-medication concerns.

Study evidence
Ashwagandha Supportive 17 studies
Fitness
Fitness
Impact
High effect
B- Goal FitA- Strength of SupportC- CoverageA Formula Quality
Ashwagandha · 500 mg

Ashwagandha Extract is a focused 500 mg adaptogen option that appears more useful for recovery and stress adaptation than for acute power, while 860 supplied reviews average 4.68.

Withanolide markers and full dose disclosure support confidence, but NCCIH reports limited athletic-performance evidence, uncertain long-term safety, medication interactions, and rare liver injury.

Study evidence
Ashwagandha Supportive 23 studies

Ingredients

IngredientAmount per serving
Ashwagandha Extract (Ashwagandha Leaf Extract, Ashwagandha Root Extract, Withanolide Glycosides)
 500 mg
Gluten Free Adults 18–50 Vegan Vegetarian
Report overview
Ashwagandha (Ashwagandha Leaf Extract, Ashwagandha Root Extract, Withanolide Glycosides) · 500 mg OverallScore86
C Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
+2

Ashwagandha Extract provides 500 mg of extract identified with withanolide markers at $0.15 per serving, with 4.68 from 860 supplied reviews. The large, favorable supplied review aggregate suggests strong customer satisfaction, although individual tolerance can still vary.

View ingredientView products
Loading alternative details
89 Performance

Anxiety & Stress Relief

Nature's Bounty
<p>A 600 mg withanolide-standardized ashwagandha extract is paired with 200 mg L-theanine for broader stress support. The original already supplies a substantial extract amount, so added standardization or complementary ingredients matter more than dose alone. L-theanine adds a separate calming pathway but may be unnecessary for users seeking ashwagandha alone.</p>
88 Performance

Ashwagandha

HTP Hi-Tech Pharmaceuticals
<p>Sensoril, KSM-66, and Ashwapure extracts combine root-and-leaf and root-only approaches with stated standardization markers. The original already supplies a substantial extract amount, so added standardization or complementary ingredients matter more than dose alone. The multi-extract design broadens the profile, though the repeated form listings make total active exposure harder to interpret.</p>
87 Performance

Stress & Anxiety Relief

Solgar
<p>A 600 mg withanolide-standardized extract plus 28 mg saffron broadens stress and mood support beyond a single-ingredient product. The original already supplies a substantial extract amount, so added standardization or complementary ingredients matter more than dose alone. Saffron raises cost and complexity, so the advantage depends on wanting both ingredients.</p>
84 Budget

Ashwagandha Root Extract

Solgar
<p>A standardized 300 mg withanolide extract plus 100 mg root powder provides a clear, focused ashwagandha formula. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. The exact withanolide percentage is not stated, which limits direct potency comparison.</p>
82 Budget

Ashwagandha 500 mg

Nature's Way
<p>A 500 mg root extract standardized to withanolides offers a simple higher-amount option without unrelated ingredients. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. A named extract and exact withanolide percentage are not provided.</p>
83 Budget

Organic Ashwagandha

Himalaya
<p>Root powder, a withanolide-standardized extract, and a supercritical CO2 extract provide multiple ashwagandha forms in one formula. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. The combined approach is broader, but the contribution of each form is not directly comparable to a single branded extract.</p>
86 Value

Ashwagandha With Sensoril 125 mg

Doctor's Best
<p>A 250 mg root-and-leaf extract standardized to withanolide glycosides provides a concise, clearly defined alternative. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. The serving cost is justified mainly by standardization rather than exceptional dose depth.</p>
84 Value

Ashwagandha

Pure Encapsulations
<p>A 500 mg root extract standardized to withanolides offers substantial single-ingredient coverage with no added botanicals. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. The unnamed extract and undisclosed withanolide percentage keep value from being fully established.</p>
81 Value

Ashwagandha Root Extract 470 mg

Solaray
<p>A 470 mg root extract provides a straightforward, relatively high-amount capsule option. It is one of the lowest-priced eligible alternatives, although it does not cost less than the original. Standardization is not stated, so the lower information quality offsets some of the apparent dose value.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults.
    Deshpande A; Irani N; Balkrishnan R; Benny IR · Sleep medicine · 2021
    Randomized trial150 participantsSleep Support forAshwagandha
  2. Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients: A double-blind, randomized, parallel-group, placebo-controlled study.
    Langade D; Thakare V; Kanchi S; Kelgane S · Journal of ethnopharmacology · 2021
    Randomized trial80 participantsSleep Support Productivity Boost forAshwagandha
  3. Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-blind, Randomized, Placebo-controlled Study.
    Langade D; Kanchi S; Salve J; Debnath K; Ambegaokar D · Cureus · 2020
    Randomized trial60 participantsSleep Support forAshwagandha
  4. Efficacy and safety of Ashwagandha (Withania somnifera) root extract in pregnant women: a prospective, randomized, comparative, open-label, 12-week study.
    Ajgaonkar A; Tayade H; Nayak A · Frontiers in global women's health · 2026
    Randomized trial70 participantsSleep Support forAshwagandha
  5. Safety and efficacy of Withania somnifera for anxiety and insomnia: Systematic review and meta-analysis.
    Fatima K; Malik J; Muskan F; Raza G; Waseem A; Shahid H; Jaffery SF; Khan U; Zaheer MK; Shaikh Y; Rashid AM · Human psychopharmacology · 2024
    Meta-analysis254 participants5 studies pooledSleep Support Mood Support forAshwagandha
  6. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: A randomized, double-blind, placebo-controlled study.
    Lopresti AL; Smith SJ; Malvi H; Kodgule R · Medicine · 2019
    Randomized trial60 participantsStress Relief Testosterone Support forAshwagandha
  7. Dual impact of Ashwagandha: Significant cortisol reduction but no effects on perceived stress - A systematic review and meta-analysis.
    Albalawi AA · Nutrition and health · 2025
    Meta-analysis488 participants13 studies pooledStress Relief forAshwagandha
  8. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults.
    Chandrasekhar K; Kapoor J; Anishetty S · Indian journal of psychological medicine · 2013
    Randomized trial64 participantsStress Relief Mood Support forAshwagandha
  9. The Impact of Ashwagandha on Stress, Sleep Quality, and Food Cravings in College Students: Quantitative Analysis of a Double-Blind Randomized Control Trial.
    O'Connor J; Lindsay K; Baker C; Kirby J; Hutchins A; Harris M · Journal of medicinal food · 2022
    Randomized trial60 participantsStress Relief forAshwagandha
  10. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial.
    Wankhede S; Langade D; Joshi K; Sinha SR; Bhattacharyya S · Journal of the International Society of Sports Nutrition · 2016
    Randomized trial57 participantsMuscle Gain forAshwagandha
  11. Evaluation of Withania somnifera (L.) Dunal (Ashwagandha) on Physical Performance, Biomarkers of Inflammation, and Muscle Status in Healthy Volunteers: A Randomized, Double-Blind, Placebo-Controlled Study.
    Raut A; Tripathi R; Marathe PA; Uchil DA; Agashe S; Rege N; Vaidya AB · Cureus · 2024
    Randomized trialMuscle Gain forAshwagandha
  12. Effects of Withania somnifera (L.) Dunal (Ashwagandha) on cognitive and physical function in adults: a systematic review and meta-analysis.
    Zhu X; Zeng Q; Lei Y; Xu D · Frontiers in pharmacology · 2026
    Meta-analysis1,249 participants20 studies pooledTestosterone Support Muscle Gain Fitness forAshwagandha
  13. Effect of ashwagandha (Withania somnifera) extract with Sominone (Somin-On™) to improve memory in adults with mild cognitive impairment: A randomized, double-blind, placebo-controlled study.
    Rai HP; Mishra DN · Journal of psychopharmacology (Oxford, England) · 2025
    Randomized trial40 participantsCognitive Support Brain Health forAshwagandha
  14. Acute and Repeated Ashwagandha Supplementation Improves Markers of Cognitive Function and Mood.
    Leonard M; Dickerson B; Estes L; Gonzalez DE; Jenkins V; Johnson S; Xing D; Yoo C; Ko J; Purpura M; Jäger R; Faries M; Kephart W; Sowinski R; Rasmussen CJ; Kreider RB · Nutrients · 2024
    Randomized trial59 participantsCognitive Support Brain Health Energy forAshwagandha
  15. A systematic review of the clinical use of Withania somnifera (Ashwagandha) to ameliorate cognitive dysfunction.
    Ng QX; Loke W; Foo NX; Tan WJ; Chan HW; Lim DY; Yeo WS · Phytotherapy research : PTR · 2020
    Systematic review5 studies pooledCognitive Support forAshwagandha
  16. Hormonal Modulation with Withania somnifera: Systematic Review and Meta-Analysis of Randomized-controlled Trials.
    Fornalik M; Malkiewicz A; Adamczak D; Nawrocki F; Zielinska A; Mondal SA · Planta medica · 2026
    Meta-analysis1,706 participants23 studies pooledTestosterone Support forAshwagandha
  17. Effect of standardized root extract of ashwagandha (Withania somnifera) on well-being and sexual performance in adult males: A randomized controlled trial.
    Chauhan S; Srivastava MK; Pathak AK · Health science reports · 2024
    Randomized trial50 participantsTestosterone Support forAshwagandha
  18. Do "testosterone boosters" really increase serum total testosterone? A systematic review.
    Morgado A; Tsampoukas G; Sokolakis I; Schoentgen N; Urkmez A; Sarikaya S · International journal of impotence research · 2024
    Systematic review3 studies pooledTestosterone Support forAshwagandha
  19. Safety of 12-Months Administration of Ashwagandha ( Withania somnifera ) Standardized Root Extract in Healthy Adults: A Prospective, Observational Study.
    Salve J; Kale S; Prajapati BL; Sparavigna A; Savant M; Ademola J; Langade D · Phytotherapy research : PTR · 2026
    Single-arm trial191 participantsTestosterone Support forAshwagandha
  20. Efficacy of Withania somnifera supplementation on adult's cognition and mood.
    Remenapp A; Coyle K; Orange T; Lynch T; Hooper D; Hooper S; Conway K; Hausenblas HA · Journal of Ayurveda and integrative medicine · 2022
    Randomized trial60 participantsBrain Health Cognitive Support Productivity Boost forAshwagandha
  21. A clinical assessment of the therapeutic effects of Ashwagandha root extract on cognitive performance, sleep, and fatigue in children aged 6-12 years.
    Saxena A; Lopresti A; Sharif M; Elon N; Suri R; Langade DK · Frontiers in nutrition · 2026
    Randomized trial85 participantsBrain Health forAshwagandha
  22. Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study.
    Gopukumar K; Thanawala S; Somepalli V; Rao TSS; Thamatam VB; Chauhan S · Evidence-based complementary and alternative medicine : eCAM · 2022
    Randomized trial130 participantsBrain Health Sleep Support Stress Relief forAshwagandha
  23. A standardized Ashwagandha root extract alleviates stress, anxiety, and improves quality of life in healthy adults by modulating stress hormones: Results from a randomized, double-blind, placebo-controlled study.
    Majeed M; Nagabhushanam K; Mundkur L · Medicine · 2023
    Randomized trial54 participantsCognitive Support forAshwagandha
  24. Efficacy and safety of ashwagandha root extract in children and adolescents with mild attention-deficit/hyperactivity disorder: a randomized, double-blind, placebo-controlled trial.
    Naik S; Muralidhar G; Rao BS; Agarwal S; Jain M · Journal of medicine and life · 2026
    Randomized trial58 participantsCognitive Support forAshwagandha
  25. Effects of multi-herb and ashwagandha root formulas on stress modulation: a randomized, double-blind, placebo-controlled clinical study.
    McKinney E; Stewart J; Kewalramani R; Singh S · Trials · 2026
    Randomized trial186 participantsEnergy Mood Support forAshwagandha
  26. Efficacy and Safety of Low-Dose Ashwagandha Supplementation on Exercise Endurance: A Randomized, Placebo-Controlled, Double-Blind, Clinical Trial.
    Prajapati H; Satia M; Shah D; Basera I; Shah T · Phytotherapy research : PTR · 2026
    Randomized trialEnergy forAshwagandha
  27. Enhancing healthspan with Ashwagandha (Withania somnifera): a comprehensive review of its multifaceted geroprotective benefits.
    Vittal M; Vinciguerra M · Biogerontology · 2025
    Narrative reviewEnergy forAshwagandha
  28. Safety and Efficacy of Ashwagandha Root Extract on Cognition, Energy and Mood Problems in Adults: Prospective, Randomized, Placebo-Controlled Study.
    Kale S; Lopresti A; Suri R; Garg N; Langade D · Journal of psychoactive drugs · 2026
    Randomized trial120 participantsEnergy Productivity Boost forAshwagandha
  29. Effects of an Aqueous Extract of Withania somnifera on Strength Training Adaptations and Recovery: The STAR Trial.
    Ziegenfuss TN; Kedia AW; Sandrock JE; Raub BJ; Kerksick CM; Lopez HL · Nutrients · 2019
    Randomized trial38 participantsFitness forAshwagandha
  30. Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adults.
    Choudhary B; Shetty A; Langade DG · Ayu · 2016
    Randomized trial50 participantsFitness forAshwagandha
  31. Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study.
    Verma N; Gupta SK; Patil S; Tiwari S; Mishra AK · F1000Research · 2024
    Randomized trial80 participantsFitness Muscle Gain forAshwagandha
  32. Effects of eight-week supplementation of Ashwagandha on cardiorespiratory endurance in elite Indian cyclists.
    Shenoy S; Chaskar U; Sandhu JS; Paadhi MM · Journal of Ayurveda and integrative medicine · 2013
    Randomized trial40 participantsFitness forAshwagandha
  33. A proprietary herbal extract of ashwagandha root for stress and anxiety in healthy adults: a randomized, double-blind, three-arm, placebo-controlled efficacy and safety study.
    West RE; Biswas A; Rao R; Tayade H; Ademola J · Journal of medicine and life · 2026
    Randomized trial141 participantsMood Support forAshwagandha
  34. Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis.
    Zhang W; Yan Y; Wu Y; Yang H; Zhu P; Yan F; Zhao R; Tian P; Wang T; Fan Q; Su Z · Pharmacological research · 2022
    Meta-analysis29 participants29 studies pooledMood Support forAshwagandha
  35. Ashwagandha Root Extract Stabilises Physiological Stress Responses in Male and Female Team Sports Athletes During Pre-Season Training.
    Coope OC; Otaegui E; Suárez M; Levington A; Abad-Sangrà M; Lloyd B; Spurr TJ; Roman-Viñas B · Nutrients · 2026
    Randomized trial56 participantsMuscle Gain forAshwagandha
  36. Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis.
    Cheah KL; Norhayati MN; Husniati Yaacob L; Abdul Rahman R · PloS one · 2021
    Meta-analysis400 participants5 studies pooledProductivity Boost forAshwagandha
  37. Effect of standardized aqueous extract of Withania somnifera on tests of cognitive and psychomotor performance in healthy human participants.
    Pingali U; Pilli R; Fatima N · Pharmacognosy research · 2014
    Randomized trial20 participantsProductivity Boost forAshwagandha
  38. Efficacy and safety of Ashwagandha root extract sustained-release (AshwaSR) capsules in healthy adult, stressed subjects: A randomized, double-blind, placebo-controlled, parallel-group, 3-arm clinical trial.
    Thanawala S; Shah R; Alluri KV; Bhupathiraju K; Desomayanandanam P; Bhuvenendran A · Medicine · 2026
    Randomized trial135 participantsSleep Support forAshwagandha
  39. Shoden promotes Relief from stress and anxiety: A randomized, double-blind, placebo-controlled study on healthy subjects with high stress levels.
    Mishra DN; Kumar M · Heliyon · 2024
    Randomized trial60 participantsStress Relief forAshwagandha
  40. Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults: A Double-blind, Randomized, Placebo-controlled Clinical Study.
    Salve J; Pate S; Debnath K; Langade D · Cureus · 2020
    Randomized trial60 participantsStress Relief forAshwagandha
  41. Examining the Effects of Herbs on Testosterone Concentrations in Men: A Systematic Review.
    Smith SJ; Lopresti AL; Teo SYM; Fairchild TJ · Advances in nutrition (Bethesda, Md.) · 2021
    Systematic review32 studies pooledTestosterone Support forAshwagandha
  42. Safety and Tolerability of Withania somnifera Root Extract in Healthy Male Participants: A Pilot Randomized, Double-Blind, Placebo-Controlled Clinical Trial.
    Vaidya N; Agarwal R; Kshirsagar P; Ganu G; Nagore D; Mehta A; Vora A; Nair S · Food science & nutrition · 2025
    Randomized trial40 participantsTestosterone Support forAshwagandha